That Man George (L'Homme de Marrakesh) (1966) [Lila]: Shot in the back at a railway station. (Thanks to Rodney)

Twitch of the Death Nerve (Reazione a catena; Bay of Blood; Antefatto; Carnage; Last House on the Left Part 2) (1971) [Renata]: Shot to death, along with her husband (Luigi Pistilli), by their young son, who was unknowingly "playing" with a real gun.

The Black Belly of the Tarantula (La Tarantola dal ventre nero) (1972) [Laura]: Stabbed to death (off-screen) by Ezio Marano in the sauna; her body is shown afterwards when Giancarlo Giannini discovers her. (Thanks to CA and Andrea)The Bermuda Triangle (Devil's Triangle of Bermuda; Secrets of the Bermuda Triangle) (1978) [Sybil]: Falls overboard from the ship; it's unclear whether she committed suicide, was compelled by supernatural forces, or accidentally fell. Her body is not shown. (Thanks to Johan)